When there is an airflow between 2 flat surfaces (track and chassis/bumper) they will be sucket to each other called ground effect. Once under my 1/8 car I mounted a large epoxy plate with only an hole for the starting wheel and cut-outs for the 4 wheels, amazing what it does! With just at 50km/h the car acted as a slotcar, it was almost possible to take a 180 degrees turn at the end of the straight without lifting the throttle.

The designer of the racing car (real car or rc ...) must create an area of low pressure underneath, so that the higher pressure above the car will apply a downward force.
In order to achieve low pressure we must design the underside of the car,so that incoming air is accelerated through a narrow slot between the car and the ground.
I think that a small part of the chassis (the front bumper…) can not change the air flow dramatically…(It is not like the front wing of an open-wheeled car...)

Anyway I have ordered a narrow bumper,so with the same setup I will see if there is difference

I´ve been testing various belts along the past months and have found that using just the optional kevlar mid belt improves both the transmission and the durability of the pulleys affected by this belt.

The car feels very loose and due to the kevlar material the pulleys don´t accumulate rubber or dust, while while with the estandar belt I usually have to clean the pulleys frequently. Additionally with this you don´t need to drill the pulleys covers (something many do in order to avoid dust in the pulleys).

hi, what size of battery pack i can use for receiver in nt1? wanted to buy some lipo or better life 6.6v to do not use lipo regulator... i have found battery pack life that size: 85x30x17.5mm. Does it fit or not really?

And one more, do I need to change battery tray from composite to more heavy? That life is 83g about...

@Roger999: I've got the NT1 Limited Edition and i 've LIFE 1100 VTEC 6.6v; this is the best solution because:

-Lipo have 7v and need adaptator_Lipo must be recharged when arrive to 5.5v, if not the lipo is definitely dead-So you use 7-5.5=1.5v only (20/30 mn run) after you have to change it ( and stop the car...

-life 1000 vtec is easy, you can use it until the end of power without problem (10/15h run) and cost 45€

I write here because of a problem that I and many racers in Italy are having. I race with the NT1 since it has been launched on the market in the end 2008. I have the right feeling with the car and I think the product is still the best. Materials are ever at the top and I'm happy to pay a little more than other brands because I know I'm sure to have the right car.The problem is that times to have the spare parts and optional parts aswell are getting longer and longer (if not impossible). I hate to buy things out of Italy because I prefer to have contact with people I can see and talk directly.But many drivers are thinking to buy something else stressed by this situation.

I already have a NT1 2012 so I will keep racing with XRAY despite all but I hope this situation will better soon.

example: I'm waiting for a lightweight 2speed shaft for 3 weeks up to now... and a friend is also in the same condition. He also waits a 2011 chassis since october...and yesterday he gave up

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